Browsing QU Ceased Journals by Title
Now showing items 524-543 of 2240
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Inhibition of Aluminium Corrosion in Hydrochloric Acid
( Qatar University , 1993 , Article)The inhibitive effect of oximes, P-diketones and hydrazides, on the corrosion of aluminium in 2M HC1 has been investigated galvanostatically. The results suggest that, in presence of inhibitors, the anode is preferentially ... -
The inhibitive action of sodium castor sulphonate Towards the corrosion of aluminium in Hydrochloric acid
( Qatar University , 1993 , Article)The dissolution of aluminium in 2M HC1 solution in presence of sodium castor sulphonate (SCS) has been studied using thermometric and hydrogen evolution methods. The results showed that the additive retards the dissolution ... -
The Inhibitive Action Of Sodium Soya Sulphonate Towards The Corrosion Of Aluminium In Hydrochloric Acid
( Qatar University , 1993 , Article)The dissolution of aluminium in 2M hydrochloric acid in the presence of sodium soya sulphonate (SSS) as corrosion inhibitor has been studied using hydrogen evolution and thermometric methods. The two methods gave consistent ... -
Inhibitory Effect Of Some Oc —Aminocarboxylic Acids On Corrosion Of Aluminium In Hydrochloric Acid Solution
( Qatar University , 1992 , Article)The corrosion of metallic aluminium in 2N hydrochloric acid solution in the presence of L-alanine, L-tyrosine, L-histidine and L-tryptophan as corrosion inhibitors has been studied using hydrogen evolution and thermometric ... -
Insect Pests Attacking Vegetable Crops in the State of Qatar (Abstract)
( Qatar University , 1982 , Article)The area cultivated with vegetable crops in the State of Qatar reached, during 1979 and 1980, a percentage of about 42.9 % of the total cultivated (or suitable to be cultivated) area. Vegetable crops selected for collecting ... -
Integration technique for neutron source standardization inside A cylindrical water tank
( Qatar University , 1993 , Article)This work deals with the evaluation of neutron irradiation facility. Two (Pu-Be) sources and two (Ra-Be) sources are used. Integration technique by a BF3 detector for neutron source standardization is used. The necessary ... -
Intensive shrimp Penaeus semisulcatus Dee Haan, culture in the Arabian Gulf during the summer
( Qatar University , 1999 , Article)P. semisulcatus juveniles (average weight 9.7g) from Manifa Lagoon on the Arabian Gulf were randomly stocked in tanks (0.8m3) at three stocking density levels (25, 50 and 75 shrimp/m3) in four replicates. The tanks were ... -
The interaction between adults and recruitments in the brachidontes variabilis l. (lamellibranchiata) bed in the bitter great lake, suez canal
( Qatar University , 1992 , Article)The purpose of the present study was to test two hypotheses concerning the interactions between adults and recruitments in the densly-packed assemblages of a population of suspension feeder (Brachidontes variabilis L.) in ... -
Interpretatin of geopotential field anomalies in area Around Sohag, Egypt
( Qatar University , 1995 , Article)The investigated area Ues in the central part of Egypt (around Sohag). The present study aims at obtaining information about the subsurface geological conditions in the area from the analysis and interpretation of both ... -
Interpretation of Gravity Anomalies Due to Lens-Shaped Structures
( Qatar University , 1982 , Article)One of the interesting exploration problems in hydrogcology is finding subsurface geological lens-shaped structures. This paper deals with the interpretation of such structures using their gravity anomalies. A master curve ... -
Interpretation Of Three Dimensional Seismic Data In Delineating The Structural Elements At Ras Budran Oil Field, Gulf Of Suez, Egypt
( Qatar University , 1989 , Article)Structural evaluation in Ras Budran oil field was achieved by using the state of art geophysical technology, represented by the 3-D seismic data. Integrated together with the borehole geological and geophysical data. The ... -
Introduction of EFLPS in an Arab Context
( Qatar University , 1997 , Article)This study investigates two inter-related topics in foreign language learning. First, it assesses the impact of introducing English as a foreign language in the primary stage curriculum, on the scholastic achievement of ... -
Investigating Organisational Climates in Jordanian Manufacturing Companies
( Qatar University , 1995 , Article)This research study is aimed at examining the concept of organisational climate in the context of Jordanian manufacturing companies. Organisational dimensions examined were: Structure, Responsibility, Reward, Risk, Warmth, ... -
Investigation of In-Service Parameters Influencing the Wear and Wear Rate for Two Rubbing Surfaces
( Qatar University , 1989 , Article)A study has been conducted on the volumetric wear and wear rate as well as the quality of the surfaces produced by rubbing brass and steel specimens. Effect of end pressure and total sliding distance between the two rubbed ... -
Investigation of Magnesium (II), Calcium (II) and Barium (II) Complexes in Aqueous Solution
( Qatar University , 2005 , Article)The ionic association constants, K6, of Mg, Ca and Ba metal ions with succinate, malate and tartrate ligands were conduct metrically determined in water at 25-40°C. The conductometric data were analysed by the Shedlovsky ... -
Investigation Of Single-Update Memoryless Cg-Methods
( Qatar University , 1996 , Article)Two new CG-methods are proposed in this work for nonlinear unconstrained optimization problems which are considered as memoryless Variable Metric (VM) methods. They are derived for the inexact line searches and evaluated ... -
Investigation of the Fouling Mechanisms in the Heat Exchangers of a Hydrotreater
( Qatar University , 2005 , Article)The problem of fouling on heat exchanger surfaces has been one of the major unresolved problems of the hydrotreatment unit at the Homs oil refinery in Syria. In this unit, a feed stream of straight-run naphtha is preheated ... -
Investigations on the growth abnormalities of medicago sativa l. Under field conditions
( Qatar University , 1996 , Article)Morphological growth abnormalities were pursued and studied in field-grown alfalfa (Medicago sativa L.) in Al-Kharj agricultural area, south east of Riyadh. Significant differences between normal and abnormal plants were ... -
Iodometric microdetermination of phosphorus in organic compounds by use of An amplification reaction
( Qatar University , 1994 , Article)A high chemical amplification method is described for the iodometric microdetermination of phosphorus in organic compounds. This method depends on combustion by the oxygen flask, absorption of the combustion products in ... -
Ionic Conductivity and Ionic Jump Distance of Nuclear Detectors Group CR-39 and BM-355
( Qatar University , 2000 , Article)Electric properties of two nuclear detectors (CR-39 and BM-355) have been investigated as a function of temperature differences. The conductivity appears to be ionic and it was increased with the temperature increase for ...